The history of science, in a sense, is the history of illusion and failure, the history of the great fools who work with clumsiness and inefficiency. --Yoshihiko Terada
Beijing has a long history and culture, is one of the four ancient capitals of China, many dynasties in history are with Beijing as the capital, Beijing as a capital city, there will certainly be a city wall around, the ancient city pool is like this, when the Beijing city wall was demolished, in the Dongzhimen gate hole found seven mysterious items, it is said to be of great use.
During the Ming Dynasty, Beijing was not the capital of the Ming Dynasty, when Zhu Yuanzhang built the capital Nanjing, and Beijing was the fiefdom of Zhu Di, the King of Yan, but later Zhu Di snatched the throne of his nephew, so he moved the capital to Beijing, and when he built the city of Beijing, Zhu Di built the overall plan of Beijing, and built tall walls around Beijing.
When Zhu Di built the Beijing city wall, the requirements for each wall brick are very strict, 48 × 24 × 12cm bricks, and the assessment is very strict, if there is a problem with which brick, will directly find the person in charge of this brick, each kiln brick needs to use 890,000 pounds of firewood, the Beijing city wall is about 24 kilometers in total, about 24 meters wide, about 14 meters high, so it is very majestic.
The Beijing city wall is not only majestic, but also able to resist many invasions, and the change of the civil fort in that year was based on the height of the Beijing city wall, which could make the Wallachian army defeated. However, the walls of Beijing can only resist cold weapons, can not resist hot weapons, when the Eight-Power Alliance invaded China and the Japanese army invaded China, the city wall was like a piece of paper in front of the artillery.
So some people said to eradicate the city wall of Beijing, when the architect Liang Sicheng planned, keep the Beijing city wall on top of the park, build a west city in the western suburbs of Beijing, but it was still denied, in the process of demolition of the city wall, in a stone slab under the Dongzhimen Gate, seven silver dollar treasures were found, arranged according to the appearance of the Seven Stars of the Big Dipper, it is said to protect the foundation of the Ming Dynasty.
However, it was a pity to demolish the Beijing city wall in the first place, and now it is a wise choice to demolish the ancient buildings and build antique buildings in other places?